I think of them doing more ok lets pile everyone up and depending on your score its a harder hill to climb. I just think that if you are way at the further below the average that much harder it becomes...probably doesn't work the other way as much since there are going to be enough solid candidates with 770s to choose between to balance out that gold medal winning former nun.
<650 You better be spectacular, a dad whose name is on a building, a mom who is a senator, Or some very under represented minority.
650-680 You have to be a very very good candidate, under represented minority, or have a great story to tell.
680-720 You have to be a solid candidate overall this is where most everyone falls so what sets you apart from the 100 other bankers from Yale?
720-760 Getting easier, slight weaknesses (GPA) can be overlooked but still need a solid app.
770+ Ok how many do we balance out the Bush twins?